Conductivity Measurement in the Kraft Process

Accurately measure conductivity within the pulp & paper industry
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Proven Reliability with Low Maintenance

Alkali concentration is a key process parameter that must be monitored at multiple locations within the kraft process including alkali concentration in the digester, residual black liquor in pulp wash stages, alkali concentration in causticizer tanks and green liquor alkali concentration. Alkali concentration is monitored using conductivity sensors instead of pH sensors due to the high process temperatures and thick pulp. Rosemount™ toroidal conductivity sensors are recommended for all applications within the kraft process due to their proven reliability with minimum maintenance. Toroidal sensors offer greater resistance to the effects of coating and corrosion than contacting conductivity sensors which is important due to the pulp and lime solids present in the process as well as the corrosive nature of the liquor used to delignify the wood.

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